How are large Internet projects created? Like the same habrahabr?

Question

Habr

Do you want to understand how such large Internet resources are created?
Where does development start?
What languages? What is the best thing to read and study?

Answer 1

Usually, herak-herak and in production. Constantly "will rewrite soon" and "this is in the next iteration". And those that are made according to well-thought-out business plans with investments attracted in advance, as a rule, do not live up to the release.
Nobody and nowhere will teach you to create large and successful products, or to develop them. Not even riveting ideas.

Answer 2

First you need an idea, then development begins, then release and promotion begins. That is, we need an idea, developers and money. The only question is how the development and subsequent support of the project will be organized. Agile all sorts, BDD, etc.
Habr is written in PHP, the language does not play a role.

Answer 3

habr is generally a small project, in general, in a week you can write in PHP + muscle in one